Clay liners

Daniel, David E.

doi:10.1007/978-1-4615-3070-1_7

Cited by 64 publications

(26 citation statements)

References 30 publications

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“…Consequently, a further decrease in the hydraulic conductivity was observed. It is interesting to note that the recorded hydraulic conductivity values for the treated soil specimens satisfied the permeability requirements for landfill liner materials (≤1 × 10 −7 cm/s) specified by [32][33][34].…”

Section: Effect Of Nanoparticles On Compaction Characteristicsmentioning

confidence: 99%

Stabilization of a Residual Soil Using Calcium and Magnesium Hydroxide Nanoparticles: A Quick Precipitation Method

et al. 2019

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The current study examines the potential of using calcium and magnesium hydroxide nanoparticles synthetized through a quick precipitation method as soil stabilizers for improving the engineering properties of tropical residual soil. The engineering properties of untreated and nanoparticles-treated soil were studied by carrying out a series of geotechnical tests including compaction, Atterberg limits, falling head permeability, and unconfined compressive strength (UCS). The stabilization mechanisms associated with soil–chemical reactions were further explored by performing microstructural analyses such as x-ray diffraction (XRD), variable-pressure scanning electron microscope (VP-SEM), and energy-dispersive x-ray spectroscopy (EDX). The findings revealed that the calcium hydroxide and magnesium hydroxide nanoparticles improved the geotechnical properties of residual soils in terms of reduced hydraulic conductivity and increased UCS. The percentage reduction of the hydraulic conductivity of magnesium and calcium hydroxide nanoparticles-treated soils compared to untreated soil after seven weeks of permeation were 85.14% and 98.70%, respectively. The magnesium and calcium hydroxide nanoparticles-treated soils subjected to 14 days of curing recorded a percentage increase in the UCS of 148.05% and 180.17%, respectively compared to untreated soil. Hence, it can be concluded that both magnesium and calcium hydroxide nanoparticles can be effectively utilized as environmental-friendly stabilizers.

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Section: Effect Of Nanoparticles On Compaction Characteristicsmentioning

confidence: 99%

Stabilization of a Residual Soil Using Calcium and Magnesium Hydroxide Nanoparticles: A Quick Precipitation Method

et al. 2019

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“…Compacted soil liners are commonly used to control or restrict contaminant migration from the landfill into the environment. When suitable natural soils are not available for use as a compacted clay liner, bentonite may be added to a non-cohesive soil (e.g., silty sand) to achieve a liner with acceptable hydraulic conductivity (Daniel 1993). Bentonitic clay materials are preferred because of their low hydraulic conductivity and good adsorption or retention capacity (Daniel 1993).…”

Section: Introductionmentioning

confidence: 99%

“…When suitable natural soils are not available for use as a compacted clay liner, bentonite may be added to a non-cohesive soil (e.g., silty sand) to achieve a liner with acceptable hydraulic conductivity (Daniel 1993). Bentonitic clay materials are preferred because of their low hydraulic conductivity and good adsorption or retention capacity (Daniel 1993). However, application of clay, clay-bentonite mixtures and polymer based synthetic liners may become extremely expensive because of the lack of suitable clay materials at or near the disposal site or because of high costs of synthetic liners (Cokca and Yilmaz 2004).…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Using Coal Fly Ash for Mine Waste Containment

2010

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This study investigates the feasibility of using coal fly ash and fly ash-bentonite mixtures as a barrier material for mine waste. The hydraulic conductivity of the coal fly ash was measured to be in the order of 2 x 10-9 m/s when it was permeated with deionized water, and this value decreased significantly when the permeant was switched to acid mine drainage (AMD). Addition of bentonite to coal fly ash lowered the hydraulic conductivity during water permeation but no further significant change was observed upon switching the permeant to AMD. Chemical analyses on the effluent from the hydraulic conductivity tests indicated that heavy metals present in AMD were attenuated and were well below the leachate criteria set by the Ontario Government. X-ray diffraction and scanning electron microscopy analyses results of post permeation samples showed significant structural differences and formation of secondary minerals after AMD permeation. The results of this study suggest that the addition of 10% bentonite to coal fly ash reduced the hydraulic conductivity of the coal fly ash to less than 1 x 10 −9 m/s and improved the chemical compatibility for mine waste containment.

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“…Os liners naturais são formações de solos argilosos de baixa condutividade hidráulica, a qual deve situar-se entre 10 -6 a 10 -7 cm/s (DANIEL, 1993). Esses solos fornecem a base protetora quase ideal para algumas situações, onde a argila pode atenuar alguns contaminantes, por processos de sorção e precipitação (LEITE, 1995).…”

Section: Figura 218 -Detalhes Da Impermeabilização Da Fundação Dreunclassified

Comportamento mecânico de resíduos sólidos urbanos

Carvalho¹

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Determinação do peso específico das partículas para as amostras representativas3.5 Ensaios triaxiais 3.5.1 Aparelhagem utilizada Ensaios triaxiais executados Ensaio de compressão confinadaCapítulo 4 -APRESENTAÇÃO DOS RESULTADOS 4.1 Ensaios in siitu 4.1.1 Sondagens de simples reconhecimento com medida de SPT e do torque 4.1.2 Ensaio de penetração contínua -CPT 4.1.3 Ensaio de infiltração em furos de sondagens 4.1.4 Tradagem para coleta de amostras e estimativa do peso específico in situ 4.1.5 Ensaio cross-hole 4.1.6 Ensaio de resistividade elétrica 4.2 Ensaios de caracterização dos resíduos sólidos urbanos coletados 4.2.1 Teor de umidade 4.2.2 Composição gravimétrica 4.2.3 Tamanho e distribuição dos componentes dos resíduos 4.2.4 Sólidos totais voláteis -STV 4.2.5 Demanda química de oxigênio -DQO 4.2.6 Solubilização e lixiviação 4.3 Determinação do peso específico das partículas paras as amostras representativas 4.4 Ensaios de compressão triaxial 4.4.1 Ensaios consolidados drenados (CD) 4.4.2 Ensaios consolidados não drenados (CU) 4.5 Ensaios de compressão confinada Capítulo 5 -ANÁLISE DOS RESULTADOS 5.1 Introdução 5.2 Ensaios In situ 5.2.1 Sondagens de simples reconhecimento com medida de SPT e do torque 5.2.2 Ensaio de penetração contínua -CPT 5.2.3 Ensaios de infiltração em furos de sondagens 5.2.4 Estimativa do peso específico in situ do resíduo 5

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Clay liners

Cited by 64 publications

References 30 publications

Stabilization of a Residual Soil Using Calcium and Magnesium Hydroxide Nanoparticles: A Quick Precipitation Method

Stabilization of a Residual Soil Using Calcium and Magnesium Hydroxide Nanoparticles: A Quick Precipitation Method

Feasibility of Using Coal Fly Ash for Mine Waste Containment

Comportamento mecânico de resíduos sólidos urbanos

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